As you felt it, ES-20 LC have a different implementation and so different behavior than the classical LC. Actually they are ethernet services oriented

Focussing on L2PVN, the classical LC will always pop up the outer tag (and PW will add another one with vc-type 4) but the EFP interface will do nothing by default. It means in your case you need to add the following command on the ES-20 LC interface:

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As you felt it, ES-20 LC have a different implementation and so different behavior than the classical LC. Actually they are ethernet services oriented

Focussing on L2PVN, the classical LC will always pop up the outer tag (and PW will add another one with vc-type 4) but the EFP interface will do nothing by default. It means in your case you need to add the following command on the ES-20 LC interface: